US2939847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of noble metal catalyst
Assignee: Universal Oil Products Co
•
Filing: 1957-11-21
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Granted: 1960-06-07
•
Expires: 1977-11-21
Abstract
No abstract record available.
Inventors
- 👤 Robert M Smith
- 👤 Haensel Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:29
CPC Classifications
C; C07; C07B; C07B61/00; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; B01J37/00; B01J37/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD FOR MANUFACTURING A PLATINUM CATALYST WHICH COMPRISES IMPREGNATING ALUMINA WITH CHLOROPLATINIC ACID IN AN AMOUNT SUFFICIENT TO YIELD A FINAL CATALYST COMPRISING FROM ABOUT 0.01% TO ABOUT 5% BY WEIGHT OF PLATINUM, SUBJECTING THE RESULTING ALUMINAPLATINUM COMPOSITE TO AIR-OXIDATION, ADDING TO THE OXIDIZED COMPOSITE SULFURIC ACID IN AN AMOUNT OF FROM ABOUT 0.3% TO ABOUT 3% BY WEIGHT OF THE FINAL CATALYST, AND THEREAFTER SUBJECTING THE COMPOSITE TO A CALCINATION TREATMENT AT A TEMPERATURE OF FROM ABOUT 800* F. TO ABOUT 1200* F.
Claim 2
Independent Claim
85 words
A METHOD FOR MANUFACTURING A PLATINUM CATALYST WHICH COMPRISES IMPREGNATING ALUMINA WITH CHLOROPLATINIC ACID IN AN AMOUNT SUFFICIENT TO YIELD A FINAL CATALYST COMPRISING FROM ABOUT 0.01% TO ABOUT 5% BY WEIGHT OF PLATINUM, SUBJECTING THE RESULTING ALUMINAPLATINUM COMPOSITE TO AIR-OXIDATION, ADDING TO THE OXIDIZED COMPOSITE SULFURIC ACID IN AN AMOUNT OF FROM ABOUT 0.3% TO ABOUT 3% BY WEIGHT OF THE FINAL CATALYST, AND THEREAFTER SUBJECTING THE COMPOSITE TO A CALCINATION TREATMENT AT A TEMPERATURE OF FROM ABOUT 800* F. TO ABOUT 1200* F.
References Cited (Backward Citations)
US2566521A
Cited
US2780584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |